Fluid flow indicator



FIG. 1 is a front elevational view of a fluid flow indicator showing my new design;

FIG. 2 is a left side elevational view thereof, the right side being a mirror image thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a fluid flow indicator, as shown and described. 